Machine for mixing concrete.



A.. K.'GOUDMUNDSON & R. E. SMITH. MACHINE FOR MIXINGA CONCRETE.

APPLICATION FILED JULY 31Al 1909. 55 Patented my s, wie.

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A. K. GOODMUNDSON & R. F. SMITH. MACHINE FCR MIXING CONCRETE.

APPLICATION FILED JULY 31, 1909l Patented May 31, 1910.

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ALVIN K. GOODMUNDSON AND ROBERT F. SMITH, OF OAKLAND, CALIFORNIA.

Specification of Letters Patent.

Patented May 31, 1910.

Application filed July 31, 1909. Serial No. 510,622.

To all whom t may concern:

Be it known that we, ALVIN K. GOODMUND- soN and ROBERT F. SMITH,citizens of the United States, residing at Oakland, in the county ofAlameda and State of California, have invented certain new and usefulImprovements in Machines for Mixing Concrete, of which the following isa specification, reference being had therein to the accompanyingdrawing.

This invention relates to machines for mixing concrete and like materialand the principal object of the same is to provide a novel type ofmixing drum and delivery trough therefor by means of which the materialis thoroughly mixed while in a heated state and automatically deliveredinto said trough from which it may be readily removed.

In carrying out the objects of the invention as generally stated aboveit will be readily understood, of course, that the essential featuresthereof are necessarily susceptible of changes in details and structuralarrangements, but a preferred and practical embodiment of the same isshown in the accompanying drawings and set forth in the claim.

In said drawings Figure 1 is a top plan view of the improved mixingmachine. Fig. 2 is an end view. Fig. 3 is a central vertical sectionalview taken on the line 3 3, Fig. 1. Fig. 4 is a horizontal sectionalview taken on the line 4 4, Fig. 2.

Referring to said drawings by numerals, 1 designates the longitudinalside beams which support the transversely arranged end beams 2, forminga base foundation for the casing 3 of the improved mixing machine. Saidend beams 2 each support a pair of standards 4 the tops of which areconnected by the transversely arranged beams 5, each of said beams 5being provided with a pillow block 6. Roller bearings 7 are carried bythe corners of each pillow for a purpose to be explained. The saidcasing 3 has its firebox 8 bolted to the end beams 2 as shown in Fig. 2.Gas or other burners 9 project into said lire box from opposite sides. Asmoke Hue 10 is carried by the upper surface of said casing 3, and saidcasing is also provided with an opening 11 through which access is hadto the interior thereof, said opening being provided with a door 12. Anopening 13 is formed centrally through each end of the casing, saidopenings being in alinement with the pillow blocks 6 of the end beams 5.

A mixing cylinder 14 has its hollow end shafts 15-16 projected throughthe end openings of the casing 3 and the pillow blocks 6, said shaftsresting on the roller bearings 7. The shaft 15 is both larger indiameter and longer than the shaft 16 and projects beyond its pillowblock and has its end enlarged and in the form of a pulley 17 adaptedfor connection with a source of power.

A semi-cylindrical trough 18 has one end resting within an annularseries of roller bearings 19 carried by one end of the cylinder 14, saidtrough extending longitudinally through said cylinder and having itsother end projecting through the shaft 16 and through the pillow block 6and resting on roller bearings 20 carried by said block. The inner endof said trough is provided with an end wall 21 provided on its outerface with a socket22 in which one end of a shaft 23 is mounted. Saidshaft 23 projects through the hollow shaft 15 and through a bearing 24supported from the base foundation of the machine and has its endequipped with a crank handle 25 by means of which said shaft 23 may berotated to turn said trouo'h to the position shown in dotted lines inFig. 3. A ratchet wheel 26 is carried b said shaft 23 which is engagedby a pawl 2 to prevent rotation of said shaft 23.

The mixing cylinder 14 is provided with a plurality of internal rows ofmixing paddles 28 which are formed of angle plates one flange of whichis rigidly fastened to the said cylinder, the other flange projectingoutwardly so as to agitate and elevate the material within the cylinder.Said paddles are arranged in staggered relation.

In operation, the material is introduced into the mixing cylinderthrough the doorcontrolled opening 29 which is brought into alinementwith the opening 11 of the casing 3. Power is applied to the pulley ofshaft 15 which rotates cylinder 14 causing its paddles 28. to agitatethe material in a manner well understood, the trough 18 having beenpreviously rotated on its roller bearings to the position shown in Fig.3 by dotted lines so that the material elevated by said paddles will notfall therein. After the material had been thoroughly mixed, the troughis rotated to the position shown more clearly in Fig. 4 and thecontinued rotation of the cylinder 14 Will cause the paddles 28 todeposit the said material in the trough so that it may be readily drawnout of the same by means of a suitable tool inserted through the endWhich projects beyond the shaft 16.

What We claim as our invention is A machine of the character describedcomprising a base, end cross beams connected to said base, a casing, arotatable drum having' mixing paddles therein mounted in said cas ingand having a collar at each end, one of said collars being terminallyenlarged to form a pulley, bearings for said collars, and means forconveying the material from said 15 drum.

In testimony whereof we hereunto aiiix our signatures in the presence oftWo Witnesses.

ALVIN K. GOODMUNDSON. ROBERT F. SMITH. Vitnesses:

H. C. SCHROEDER, F. P, SCHROEDER.

